Bororo

(map)

A man, Kiare Ware, discovered his son Toribugu had sex with the son's stepmother--very taboo. Trying to kill him, Kiare Ware sent him on dangerous tasks. One of the tasks was to get nuts from a palm in the middle of a swamp guarded by spirits. At his grandmother's suggestion, he sent a squirrel on the mission. When the squirrel dropped a piece of stem, the spirits made the water rise to the crown of the tree, but the squirrel, climing to the top, escaped and waited for the water to drop again, and then delivered the palm nuts.

Johannes Wilbert and Karin Simoneau, eds., Folk Literature of the Bororo Indians (Los Angeles: UCLA Latin American Center Publications, 1983), 198-203.